Optical fiber management

ABSTRACT

The present disclosure includes devices and systems for optical fiber management. One embodiment includes a device comprising an integrated separation surface separating an upper level of storage and a lower level of storage and an integrated adapter plate comprising a number of optical connectors and arranged at a first angle with respect to a floor of the device.

CROSS REFERENCE TO RELATED APPLICATION

This application is a continuation application of pending U.S.application Ser. No. 16/025,121 filed Jul. 2, 2018, which is acontinuation of U.S. application Ser. No. 14/870,691, filed Sep. 30,2015, now U.S. Pat. No. 10,012,814 issued Jul. 3, 2018, which claims thebenefit of U.S. Provisional Application No. 62/058,364, filed on Oct. 1,2014, all of which are hereby incorporated by reference.

BACKGROUND

An optical fiber (e.g., glass, plastic) carries light along its length.Light is kept in the core of the optical fiber by internal reflection.The optical fiber acts as a waveguide. Optical fiber can be used as acommunication medium for telecommunication and networking applicationsbecause it is flexible and can be bundled into cables. Although referredto as “optical fiber,” optical fiber is not restricted to communicatinglight in the visible spectrum, and may transmit light signals of higher,or lower, wavelengths.

Optical fiber is especially advantageous for communications becauselight propagates through the fiber with less attenuation than forelectrical signals using metal wires. This facilitates long distancecommunications using few-repeaters. Unlike electrical communicationmodes, light signals are immune to electromagnetic interference, therebyeliminating cross-talk between signals and the effects of environmentalnoise. Non-armored optical fiber cables do not conduct electricity,which makes optical fiber a good solution for protecting communicationsequipment located in electrically-exposed environments, includingcommunication structures prone to lightning strikes.

Optical fiber permits transmission at higher bandwidths (e.g., datarates) than other forms of communications. Per-channel light signalspropagating in the fiber can be modulated at rates in the range ofgigabits per second. An individual optical fiber can carry manyindependent channels, each using a different wavelength of light andwavelength-division multiplexing (WDM). Optical fiber saves space incable ducts because a single optical fiber can carry much more data thana single electrical cable.

A fiber optic cable is usually made up of many individual opticalfibers. For example, according to one commercially availableconfiguration, twelve (12) 250 micron optical fibers may be groupedtogether in a buffer tube. A fiber optic cable may contain 6 buffertubes (i.e., for a total of 72 optical fibers) and one or more strengthmembers (e.g., metallic member), with the buffer tubes and strengthmember being surrounded by a jacket providing physical and environmentalprotection. Other commercially available fiber optic cableconfigurations may include 144 optical fibers (e.g., 12 buffer tubes of12 optical fibers each), or 288 optical fibers (e.g., 12 buffer tubes of24 optical fibers each), and ribbon fibers, among others.

Individual optical fibers (e.g., glass, plastic) can be fragile, andrequire measures to prevent fracturing, or breakage. Optical fiber canbe subject to physical routes limited to a minimum bend radius, at thecable level and/or at an individual fiber level, to prevent fracturing,breakage, or signal distortions/losses. In addition, optical fibers maybe damaged if they are subjected to excessive tension or physicalimpact. Due to the risk of damage, it is preferable to avoid handlingindividual fibers any more than is necessary.

Optical fibers are increasingly being used to provide signaltransmission between various service providers (e.g., telephone systems,video systems, computer network, etc.) and individual users (e.g.,homes, businesses). Fibers which support many propagation paths ortransverse modes are called multi-mode fibers (MMF), while those whichcan only support a single mode are called single-mode fibers (SMF). MMFgenerally has a larger core diameter, and is used for short-distancecommunication links, and SMF is used for longer distance communicationlinks. Working with optical fiber (e.g., splicing, splitting, patching)involves close tolerances, and is best accomplished in controlledenvironments where physical alignments, temperature, and cleanliness arebetter managed to facilitate precision work results.

BRIEF DESCRIPTION OF THE DRAWINGS

FIGS. 1A and 1B are views of a fiber management cabinet in accordancewith one or more embodiments of the present disclosure.

FIGS. 2A-2F are views of components within a fiber management cabinet inaccordance with one or more embodiments of the present disclosure.

FIGS. 3A-3D are views of a splitter in accordance with one or moreembodiments of the present disclosure.

FIGS. 4A-4H are views of a fiber management device in accordance withone or more embodiments of the present disclosure.

FIGS. 5A-5C are views of a fiber management device in accordance withone or more embodiments of the present disclosure.

FIGS. 6A-6F are views of a ribbonizing tool in accordance with one ormore embodiments of the present disclosure.

DETAILED DESCRIPTION

Optical fiber management apparatuses, such as outside plant (OSP)distribution cabinets, distribution frames, patch panels, and spliceterminations are used wherever the interconnection or cross-connectionof multiple optical fibers is required. For example, optical fiber cablecomprising numerous individual fibers may enter a distribution cabinet,fiber frame, or patch panel for connection to the individual opticalfibers that split off to provide service to homes or businesses. Often,it is desirable that such optical fiber management, and/or optical fiberconnection apparatus, allow for the interconnection of a large number ofindividual fibers in as small a space as possible (e.g., high densityconnections).

It may be desirable to make the work of technicians installing andservicing the optical fiber connection apparatuses and associatedoptical fibers as simple as possible. Previous patch panel approachesmimicked electrical termination cabinets. Traditional central officefiber management uses a fixed bulkhead design and costly radius andphysical fiber protection inside an overall housing. While theseapparatus provide some protection to the connectors and fibers, thefibers may then typically be routed only through the top and bottom ofthe unit or only through slots in the side of the unit. Density istherefore sacrificed to gain protection of the connectors and fibers.

Previous optical fiber management approaches include the use ofabove-grade outdoor fiber management cabinets. These cabinets may belarge, heavy, and non-portable cabinets used to protect optical fibers.Some cabinets may be below-grade, but these cabinets are also large,heavy, and non-portable, and are much more expensive than theirabove-grade counterparts.

In contrast, examples of the present disclosure include an optical fibermanagement device, or “cassette” (hereinafter “cassette”) and/or anoptical fiber management cabinet with reduced footprints. For instance,an optical fiber management cassette in accordance with the presentdisclosure can include a cassette that allows for maintenance of aparticular fiber bend radius, while maintaining a compact size.

An optical fiber management cabinet in accordance with the presentdisclosure can include a cabinet that is compact in size and can beinstalled above-grade or below grade. An optical fiber managementcabinet in accordance with the present disclosure may be portable, suchthat the entire cabinet can be transported in the field to a locationfor maintenance and repairs, for instance.

Examples of the present disclosure can also include a ribbonizing toolfor ribbonizing optical fiber and a splitter for splitting opticalfiber. In some examples, the ribbonizing tool may be attached to thecassette during a shipping process, for instance.

In the following detailed description of the present disclosure,reference is made to the accompanying drawings that form a part hereof,and in which is shown by way of illustration how one or more embodimentsof the disclosure may be practiced. These embodiments are described insufficient detail to enable those of ordinary skill in the art topractice the embodiments of this disclosure, and it is to be understoodthat other embodiments may be utilized and that process, electrical,and/or structural changes may be made without departing from the scopeof the present disclosure. In addition, the proportion and the relativescale of the elements provided in the figures are intended to illustratethe embodiments of the present disclosure, and should not be taken in alimiting sense. The last two digits of reference numbers correspond toan item, with preceding digits corresponding to the drawing number. Forexample, one embodiment of the present disclosure is indicated by thereference number 406 with respect to FIG. 4, and a similar embodiment isindicated by the reference number 506 with respect to FIG. 5.

In the following detailed description of the present disclosure,reference is made to the accompanying drawings that form a part hereof,and in which is shown by way of illustration how one or more embodimentsof the disclosure may be practiced. These embodiments are described insufficient detail to enable those of ordinary skill in the art topractice the embodiments of this disclosure, and it is to be understoodthat other embodiments may be utilized and that process, electrical,and/or structural changes may be made without departing from the scopeof the present disclosure.

As used herein, “a number of” something can refer to one or more suchthings. For example, a number of components can refer to one or morecomponents.

FIGS. 1A and 1B are views of a fiber management cabinet 100 inaccordance with one or more embodiments of the present disclosure. FIGS.1A and 1B illustrate the exterior of cabinet 100. Fiber managementcabinet 100 may have a smaller footprint, a lower space requirement, belighter weight, and be a lower cost alternative to previous metalenclosure cabinets. For instance, cabinet 100 may have a footprintcapable of fitting in a 17 inch×30 inch vault. Cabinet 100 may bedesigned for below grade (weatherproof) applications, but may also besuitable for standard above ground installation, as well as being polemounted. In some examples, cabinet 100 may be installed in an areaincluding a boulevard or an area between a curb and a sidewalk in anurban environment with these physical features or an area equal to thesame in a less dense or more rural environment. In such an area, abroadband network can be built without requiring permission fromproperty owners other than the utility or municipality for buried plantor pole line access. In some examples, cabinet 100 may be accessed on aregular basis, and may be located in a handhole or vault that fits intothis application area (e.g., 17 inch×30 inch vault).

The assembly process for an empty (no cassettes or splitters) cabinet100 may be tool-less, which may allow for a de-skilled and rapidassembly in a factory, in the field, or at a distribution location,among others. Cassettes and splitters, as will be discussed furtherherein, may be pre-configured and terminated at a location different orthe same as cabinet 100. These finished assemblies can be loaded intothe product during the assembly of cabinet 100 or shipped as separateitems to customers and distributors, among others.

Cabinet 100 may be composed of, for example, weatherproof material.Cabinet 100 may accommodate, for instance, a number of ports. In oneexample, cabinet 100 can accommodate 288 distribution ports (SC) and 24feeder ports (capacity of 26 cassettes total). The number of ports isnot limited to these examples, however. More or less ports may beaccommodated by cabinet 100.

Cabinet 100 can allow for easy entry and closure for service needs andupdates. For instance, cabinet 100 can include latch or “snap and lock”closures, for instance, as illustrated by closures 102-1. In someinstances, cabinet 100 can include a claw/latch set closure 202-2, asillustrated in FIG. 2F. Cabinet 100 can allow for an ability to easilyremove cassettes and/or gain access to cassettes for splicing, andtroubleshooting, among others.

FIGS. 2A-2F are views of components within a fiber management cabinet200 in accordance with one or more embodiments of the presentdisclosure. FIGS. 2A-2F illustrate different views of the inside ofspherical cabinet 200. For example FIG. 2A may be a “front perspective”view of cabinet 200, while FIG. 2B is a “back” view. However, as thecabinet 200 is spherical, views should not be limited to “front”,“back”, etc. For ease of reference, FIGS. 2A-2F will be discussedtogether. Cabinet 200 can include jacketed fiber slack storage space,also known as a base 218, to accommodate slack storage of jacketed fiber(e.g., buffer tube, ribbon cable, etc.). For instance, cabinet 200 mayaccommodate 20 feet of slack when fully loaded with feeder anddistribution. Cabinet 200 may also be available in patch-only andpatch-and-splice configurations. As will be discussed further herein,cabinet 200 can include a built-in splitter 210 (e.g., splittercage/housing).

Cabinet 200 can allow for easier removal of the cabinet and componentsand/or access to the cabinet and components as compared to otherapproaches. For instance, a cassette 206 can be part of the assemblybeing placed onto swing-out arm 212 that locks into position whendeployed, and swings out when access is required, allowing forhands-free work practice. Cassette 206 may be removable off of thisfeature when it is desired to remove the entire cassette 206 completelyfrom the unit. Cassette 206 can slide onto a rail on arm 212 and canlock into arm 212 and into cabinet 200 and/or can comprise tabs(illustrated in FIG. 4A) configured to be received by arm 212 tostabilize the cassette. For example, cassette 206 may lock into place inmultiple locations (e.g., into the arm 212 and into cabinet 200) toprevent sag and other issues when used in combination with swing-out arm212.

The swing-out arm 212 may have a locking feature in the deployedposition. This can work alongside a cassette's locking feature toprovide a three-point locking feature to prevent sag- andvibration-related conditions that may cause the swing arm and cassetteto become disengaged.

Cabinet 200 may be portable, such that it can be easily moved to adifferent location, for instance, a splice truck. Additionally,bulkheads internal to cabinet 200 can include a “mirror” symmetricaltwo-sided design allowing for placement into the round enclosure that iscabinet 200. Cabinet 200 can include input ports (e.g., six inputports), allowing for route diversity of cables. Cabinet 200 can alsoaccommodate a smaller cassette allowing ribbon splicing and opposite endfeeds for tube diameter routing. A cassette 206 of particular size, aswill be discussed further herein, can be used within cabinet 200. Thecassette 206 can support different media (e.g., ribbon and/or loosetube).

A splitter 210 to support different tubing sizes (e.g., 1×4, 1×8, 1×16,1×32 and multiples thereof) can fit within the reduce spaced of cabinet200, as will be discussed further herein. In order to do this, a smallerfootprint is required. The cassette module 214 may be of a snap-and-lockdesign where a particular number (e.g., nine) of these components willnest into a splitter cradle on the bulkhead of cabinet 200. Media may bea particular size (e.g., as large as 2 mm and as small as 900 um) forreduction of cable pile-up throughout the route path without increasedrisk of damage to splitter legs.

A radius limiter 208 with “retention arms” (e.g., overlapping retentionarms) may be located through the entire route path (splitter 210 toparking lot 204 and splitter 210 to distribution (subscriber port)) toeliminate the possibility of jumpers “fall off due to orientation of thecabinet 200 in a stored position. Unlike prior cabinets where verticalorientation is mandatory due to mounting methods, cabinet 200 can beplaced vertically or horizontally dependent on a size of vault it isplaced in, for example. Additionally, cabinet 200 may portable, allowingtechnicians to transport the entire unit from a vault, above grade, orpole, to a tent or splice trailer for servicing/installation. The radiuslimiter 208 with retention arms may ensure the route path is maintainedduring these events.

Radius limiter 208 (referring to both the individual and the group) cansecure routed fibers into place regardless of the cabinet orientation ina stored position or during transport and handling, and a rod (e.g., ofthe radius limiter 208) that fibers lay over can have a radius thatmeets a particular bend radius requirement for the media planned toroute over it. The radius rod may have capture tabs or ears to preventfibers from sliding off of them. These capture tabs or ears may be longenough to assist same fiber capture for radius rods directly adjacent(e.g., above and/or below). Minimal clearance between rods and tabs(ears) may allow a user to route jumpers during subscriber turn-up ofsplitter leg to subscriber port and subsequent slack storage through theroute path.

As noted above, cabinet 200 can also include a parking lot 204 foroptical fibers. In some instances, parking lot 204 may be disposable.Parking lot 204 may store unused optical fiber and/or splitter legs. Forinstance, parking lot 204 may include clips, foam block, and/or deadadapters to hold connectors) until they are later used.

Cabinet 200 can include panels 291 that may protect components of thecabinet. In some instances, panels 291 may slide or clip into place.Panels 291 may be removable or may be integrated. Components withincabinet 200 may be arranged in varying heights depending on demand onthe system. For instance, components can be stacked higher when morecassettes are desired and/or when more optical fiber is desired.

FIGS. 3A-3D are views of a splitter 310 in accordance with one or moreembodiments of the present disclosure. For ease of reference, FIGS.3A-3D will be discussed together. FIG. 3 A is a front view of splitter310, FIG. 3B is a top view of splitter 310, FIG. 3C is a side view ofsplitter 310, and FIG. 3D is a schematic view of splitter 310.

Splitter 310 may be fully functional and compliant in an OSP environment(e.g., +85 to −40 C operating temperature ranges) for use within cabinet100, 200. Splitter 310 may be capable of handling a number of differentfiber sizes including 1×4, 1×8, 1×16, and 1×32, among others. Splitter310 can also accommodate multiples devices of the 1×4, 1×8, 1×16splitter varieties, among others. Splitter 310 may be of a tool-lessinstallation with a placement method that centers the splitter in itsdesired position, within a splitter cradle (e.g., having nine positions)and locks it into position with another latching feature. In someexamples, splitter 310 includes ruggedized splitter legs 327 (e.g., 900um ruggedized splitter legs) for reduced cable pile-up through the routepath. The splitter legs 327 may be of a ruggedized design for an OSPenvironment with flexibility that may be maintained, for instance, downto −40 degrees C. The splitter legs 327 may be of a length that allowsfor deployment to any port with proper slack take-up through the routepath. Additionally or alternatively, splitter 310 may include differentsize splitter legs, for instance 1.6 m and/or 2.0 m splitter legs withthe same or similar requirements as the aforementioned splitter legs.Splitter 310 may be of a particular shape that meets the placementmethod externally and addresses proper radius protection and slackstorage internally of the optical component device. Adequate room toallow for thermal expansion and contraction of splitter 310 and its legsmay be considered for un-conditioned OSP environments.

A case 329 for splitter 310 may include a smaller case size as comparedto other splitter cases. For instance, a width of the splitter case 329may be smaller than widths of other splitters. This may allow forloading, sealing, and or testing of optical components at multiplelocations, for instance.

The splitter case 329 may have radius protection built-in, such as, forinstance, a rounded or oval case, or rounded edges inside of the case.The splitter case may allow for a particular bend radius or radiusesinside of the case, and case exits may accommodate particular sizes ofsplitters (e.g., a 1×32 splitter). Other options may also beaccommodated (e.g., two 1×16, four 1×8, etc.).

Additionally, or alternatively, splitter case exits may accommodate aparticular rubing/upjacketing size (e.g., 900 um tubing/upjacketingsize). Other sizes may include, for instance 1.2 mm, 1.6 mm, and/or 2.0mm. In a number of examples, case exits for input and output legs may beon same side, and the splitter case 329 can include a closure with snapand/or living hinge or other closure that does not require adhesives orsealant. Additionally, the closure may be tamper-proof. In someinstances, the splitter case 329 may incorporate a press-infastening/lock system allowing for tool-less install and securefastening. In some instances, the splitter case 329 may be adaptable foruse in other optical components (e.g., wavelength division multiplexing,etc.) The splitter case 329, in some examples, may be composed of amaterial with a particular rating, such as, for instance, a V-0 rating.

FIGS. 4A-4G are views of a fiber management cassette 406 in accordancewith one or more embodiments of the present disclosure. FIG. 4A is a topview of cassette 406, FIG. 4B is a schematic top view of cassette 406,FIG. 4C is a front view of cassette 406, FIG. 4D is a side view ofcassette 406, FIGS. 4E and 4F are exploded views of cassette 406, FIG.4G is a schematic bottom view of cassette 406, and FIG. 4H is across-sectional view of cassette 406. For ease of reference, FIGS. 4A-4Hwill be discussed together.

Cassette 406 may be a one piece, two-sided fiber management device withtop cover 437 and bottom cover 439. In at least one embodiment, cassette406 includes a an integrated separation surface 413 separating an upperlevel of storage 415 and a lower level of storage 417 and an adapterplate 426 comprising a number of optical connectors 424 (e.g., twelve,as illustrated). The adaptor plate may be integrated into cassette 406,in some instances. The adaptor plate 426 may be angled (e.g., at angle409) with respect to a floor 419 of the device to accommodate opticalfiber management components beneath at least a portion of the number ofconnectors 424 while maintaining a particular radius bend limitcorresponding to the optical fiber. In some instances, a depth of thecassette 406 may be such that the particular radius bend limit cannot bemaintained without accommodating the optical fiber management componentsbeneath the connectors 424. Separation surface 413 may be arranged at aparticular angle 407 with respect to floor 419, and this angle may bedifferent than angle 409. Angles 407 and 409 may allow for desiredplacement of connectors 424 within cassette 406, as well.

Cassette 406 may be more compact than previous cassettes, for instance,to fit within the reduced size of cabinet 100, 200. For instance,cassette 406 may be approximately 4 inches×6 inches×0.8 inches; however,cassette 406 is not limited to these dimensions. For example, otherdimensions may be used that allow for cassette 406 to be used with aparticular cabinet (e.g., cabinet 100, 200) and allow for a particularoptical fiber radius bend limit. Cassette 406 may also, in someexamples, be backwards compatible with other optical fiber managementsystems.

Covers 437 and 439 may be included for increased fiber protection andmay be resiliently connected (e.g., releasable, removable, hinged,detachable) to cassette 406. In some instances, covers may not beremovable (e.g., via a living hinge). In some examples, cassette 406 maynot include covers. For instance, cassettes stacked atop one another mayprovide ample protection such that no cover is used. A first side ofcassette 406 may be used for splicing, while the other side may be usedfor terminated assembly slack storage and/or may facilitate opticalfiber management components including, for example, a heat shrink fusionsleeve, a snap-in feature, and/or a distribution fiber pigtail 411. Insome instances, cassette 406 may include the snap-in feature 441 (e.g.,tool) for transition “bullet” of the pre-terminated assembly. This is aribbon assembly whereby the “transition” is where the assembly istransitioned from a ribbon cable to twelve discrete 900 um legs forsingle circuit access on the front of the cassette.

Cassette 406 may also include a transition route path from one side tothe other and a locking feature on the back of the cassette that canwork with swing arm detail in cabinet 100, 200 for increased in-positionlocking capabilities. Cassette 406 may also include tabs 421 to bereceived by the swinging arm to stabilize the cassette and reducesagging, for instance. Cassette 406 can further include features forganging multiple cassettes together, and cassette 406 can be installedwithout tools (e.g., tool-less installation for manufacturing or theend-user). As noted, in some examples, cassette 406 can have an angledadapter (plate) orientation on a bulkhead within cabinet 100, 200 toallow clearance for necessary optical fiber management components whilemaintaining a particular bend radius standard (e.g., for 900 um fiber).To accommodate a particular bend radius standard, cassette 406 maycomprise a particular depth, height, and/or length. In some examples,cassette 406 can accommodate a particular bend radius standard, and upto 24 pre-terminated fibers.

Features and components of cassette 406 may be molded into the cassette,for instance, rather than being resiliency connected. Such featuresinclude, for instance, integrated splice tray functionality located onseparation surface 413 and/or an integrated adaptor plate 426. In someinstances, no adaptor plate 426 is included. Large slack storage may notbe included because ribbon fiber is used in the cassette, reducing theneed for large slack storage, in some instances. The molded/integratedcomponents may result in less damage to cassette 406, as removal ofdifferent components may not be necessary.

Cassette 406 may include an identifier portion 405 that provides anidentifier for each respective one of the number of connectors 424(e.g., identifies port or color). Identifier portion 405 may be angled,such that identifier portion 405 is visible when cassettes are stack ontop of one another. The identifiers of portion 405 (e.g., numbers 1-12as illustrated in FIG. 4A) allow for improved (both in time and ease)identification of individual connectors.

Cassette 406 may further include adaptor removal tabs 440 (e.g., twelveillustrated in FIG. 4G). Tabs 440 can be used to remove connectors 424for cleaning, inspection, and/or repairs, among others. This is incontrast to other devices that may include removable faceplates oradaptor plates, for instance.

With particular respect to FIG. 4H, cassette 406 includes integratedseparation surface 413 separating an upper level of storage 415 and alower level of storage 417. Cassette 406 also includes an integratedadaptor plate 426 comprising a number of optical connectors (e.g.,connector 424). Adaptor plate 426 may not be removable, and may bearranged at a first angle with respect to a floor 419 of device 406. Forinstance, angle 409 may range from 80-90 degrees.

Separation surface 413 may be arranged at angle 407 with respect tofloor 419 of the device. For instance, angle 407 may range from 0 to 6degrees. Angles 407 and 409 accommodate optical fiber managementcomponents beneath at least a portion of the number of connectors whilemaintaining a particular radius bend limit corresponding to opticalfiber (e.g., ribbon fiber). The optical fiber management components mayinclude, for instance, a distribution fiber pigtail 411 and/or a heatshrink fusion sleeve, among others. In some examples, a ribbonizingtool, as will be further described herein, may be resiliency connectedto cassette 406. This tool may be removed from the cassette, used in thefield or elsewhere, and discarded, for example. This ribbonizing toolmay be more compact in size as compared to other ribbonizing tools, andmay reduce or eliminate a need for hand-ribbonizing optical fiber.

FIGS. 5A-5C are views of a fiber management cassette 506 in accordancewith one or more embodiments of the present disclosure. In a number ofexamples, cassette 506 may be capable of adding ports via patch-only(pre-terminated tails) as illustrated in FIG. 5B (e.g., via pigtail 511)or patch-and-splice (in-cassette splicing of pre-terminated assembly toIFC or OSP multi-fiber cables) capable for ribbon-only as illustrated inFIG. 5A, using snap-in feature 541. Additionally or alternatively,cassette 506 may be capable of ribbon-only splicing for pre-terminatedpatch-only or patch-and-splice configurations which may require anin-the-field ribbonizing technique through the development of adisposable ribbonizing tool, as will be discussed further herein, or ajig that may be attached to each cassette 506 for one-time use. Asillustrated in FIG. 5C, cassette 506 may be capable of multi-fiberplug-in connectors (MPO) plug-and-play (e.g., via connector 531).

FIGS. 6A-6F are views of a ribbonizing tool 620 in accordance with oneor more embodiments of the present disclosure. For ease of reference,FIGS. 6A-6F will be discussed together. FIG. 6A is a top view of tool620, FIG. 6B is a schematic view of tool 620 when closed, FIG. 6C is aside view of tool 620, FIG. 6D is a front view of tool 620, and FIGS. 6Eand 6F are schematic views of tool 620 when open.

Ribbonizing can include transforming loose optical fibers (relative toone another) into ribbonized fibers. A ribbonized format can includeoptical fibers positioned in a horizontal array coated (e.g., with a geland/or acrylate coating, among others) to keep them in the horizontalarray. Tool 620 can include a clamshell design with an upper cover 622and a lower cover 624 connected by hinge 628 whereby the user can placea number (e.g., twelve) fibers (e.g., 250 micron fibers), assuringproper color code alignment, into tool 620 and snap close the uppercover 622 over spring tab 635 securing the fibers into place. The usercan take a ribbonizing coating and place an amount that fills a void 626configured to receive the coating within the tool 620 where the fibershave been placed. The fibers can be pulled through the ribbonizingcoating and through the tool 620 allowing a particular amount (e.g., aminimal amount) of coating to adhere to the fibers and secure them in abonded ribbon (e.g., a bonded 12-fiber ribbon) on the other side. As aresult, the fibers are ribbonized, including having a particular coatingamount, particular alignment, and particular surface tension, amongothers) and ready for mass fusion splicing as per an equipmentmanufacturer's splicing instructions. Void 626 can improve the ease andcleanliness of the ribbonizing process, as the void 626 received theribbonizing coating, reducing the potentially of a messy process.

As previously noted, tool 620 may be connected to the cassette (e.g.,when shipped to a customer) and can be removed from an optical fibermanagement cassette, used in the field or elsewhere, and discarded, forexample. Tool 620 may be more compact in size as compared to otherribbonizing tools, and may reduce or eliminate a need forhand-ribbonizing optical fiber. For instance, tool 620 may havedimensions of approximately 0.5 inches×0.9 inches×0.3 inches; however,tool 620 is not limited to these dimensions. Additionally, tool 620 usesspring tab 635, which may result in increased versatility and ease ofuse as compared to tools that use living hinges, for example.

The present disclosure includes devices and systems for optical fibermanagement. One embodiment includes a device comprising a dual-sidedsingle piece optical fiber management device. In some instances, thedevice has an angled orientation and wherein optical fiber within thedevice maintains a particular radius bend limit.

The present disclosure provides modular cassettes and methods for fibermanagement applications that satisfy all the basic principles of fibermanagement with such cassettes. Cassettes in accordance with the presentdisclosure comprise plural functional components that nest into a mainhousing portion to support various application and fiber types. Inaccordance with the present disclosure, such components can be added orremoved depending on the application and configuration needs of the useenvironment. Advantageously, cassettes in accordance with the presentdisclosure incorporate resilient connections and nested internalcomponents for easy assembly and disassembly with minimal fastenersand/or tools.

Furthermore, the present disclosure provides cable management cassettesand management techniques that include one or more of the followingcapabilities: patch only configuration; and patch and spliceconfiguration to reduce costs without giving up convenience and/or thequality of splicing that traditional patch-only environments.

In accordance with the present disclosure, components can be added orremoved depending on the application and configuration needs of the useenvironment. Furthermore, a number of embodiments of the presentdisclosure include one or more of the following capabilities: a reducedfootprint to minimize space requirements and snap-together components,among others.

CONCLUSION

The present disclosure includes devices and systems for optical fibermanagement. One embodiment includes an optical fiber management deviceincluding an integrated separation surface separating an upper level ofstorage and a lower level of storage and an integrated adapter platecomprising a number of optical connectors. The integrated adapter platemay be arranged at a first angle with respect to a floor of the deviceto accommodate optical fiber management components beneath at least aportion of the number of connectors while maintaining a particularradius bend limit corresponding to optical fiber.

Although specific embodiments have been illustrated and describedherein, those of ordinary skill in the art will appreciate that anarrangement calculated to achieve the same results can be substitutedfor the specific embodiments shown. This disclosure is intended to coveradaptations or variations of one or more embodiments of the presentdisclosure. It is to be understood that the above description has beenmade in an illustrative fashion, and not a restrictive one. Combinationof the above embodiments, and other embodiments not specificallydescribed herein will be apparent to those of skill in the art uponreviewing the above description. The scope of the one or moreembodiments of the present disclosure includes other applications inwhich the above structures and methods are used. Therefore, the scope ofone or more embodiments of the present disclosure should be determinedwith reference to the appended claims, along with the full range ofequivalents to which such claims are entitled.

In the foregoing Detailed Description, some features are groupedtogether in a single embodiment for the purpose of streamlining thedisclosure. This method of disclosure is not to be interpreted asreflecting an intention that the disclosed embodiments of the presentdisclosure have to use more features than are expressly recited in eachclaim. Rather, as the following claims reflect, inventive subject matterlies in less than all features of a single disclosed embodiment. Thus,the following claims are hereby incorporated into the DetailedDescription, with each claim standing on its own as a separateembodiment.

What is claimed is:
 1. A system comprising: an optical fiber managementcassette comprising pre-terminated connectors, a separation surfaceseparating an upper level of storage and a lower level of storage, and anon-removable, angled adaptor plate, wherein the separation surface andthe adaptor plate are angled differently with respect to a floor of theoptical fiber management cassette; and a cabinet comprising: a radiuslimiter; a swinging arm connector to receive the optical fibermanagement cassette; a splitter housing; and a base configured forintegrated optical fiber slack storage of at least one of: buffer tube;and ribbon cable.
 2. The system of claim 1, wherein the cabinet furthercomprises a disposable parking lot for optical fibers.
 3. The system ofclaim 1, wherein the optical fiber management cassette further comprisestabs configured to be received by the swinging arm to stabilize theoptical fiber management cassette.
 4. The system of claim 1, wherein theradius limiter is configured to limit a bend radius of optical fiberwithin the cabinet when configured in a vertical orientation.
 5. Thesystem of claim 1, wherein the radius limiter is configured to limit abend radius of optical fiber within the cabinet when configured in ahorizontal orientation.
 6. The system of claim 1, wherein the radiuslimiter comprises a plurality of overlapping retention arms configuredto limit a bend radius of optical fiber within the cabinet.
 7. A systemcomprising: an optical fiber management cassette comprisingpre-terminated connectors and further comprising: an integratedseparation surface separating an upper level of storage and a lowerlevel of storage, and an integrated adapter plate arranged at a firstangle with respect to a floor of the cassette and configured to receivea number of optical connectors in the upper level of storage; whereinthe separation surface is arranged at a second angle with respect to thefloor of the cassette and configured to accommodate at least one opticalfiber management component in the lower level of storage, the firstangle and the second angle being different angles; and a cabinetcomprising: a radius limiter, a swinging arm connector to receive theoptical fiber management cassette, a splitter housing, and a baseconfigured for integrated optical fiber slack storage of at least oneof: buffer tube; and ribbon cable.
 8. The system of claim 7, wherein theintegrated adapter plate is not removable from the device.
 9. The systemof claim 7, wherein the optical fiber includes ribbon fiber.
 10. Thesystem of claim 7, wherein the cassette comprises a resilientlyconnected cover.
 11. The system of claim 7, wherein the at least oneoptical fiber management component includes at least one of: adistribution fiber pigtail; and a heat shrink fusion sleeve.
 12. Thesystem of claim 7, wherein the cassette comprises an identifier portionproviding an identifier for each respective one of the number of opticalconnectors.
 13. The system of claim 1, further comprising a ribbonizingtool resiliently connected to the cassette.
 14. The system of claim 13,wherein the ribbonizing tool comprises a void to receive ribbonizingcoating.
 15. The system of claim 13, wherein the ribbonizing toolcomprises a spring tab to facilitate opening and closing of theribbonizing tool over an optical fiber.
 16. The system of claim 15,wherein the ribbonizing tool is configured to: deposit a particularamount of ribbonizing coating on an optical fiber pulled through theribbonizing tool; align the optical fiber in a particular alignment; anddeposit the particular amount of ribbonizing coating such that it has aparticular surface tension.